Siswatia is a village in Parihar tehsil in district of Sitamarhi, Bihar, India. As per the data provided by Census of India in 2011, total population of Siswatia was 2,070 which includes 1,108 males and 962 females. Siswatia covers 204.8 ha area. Pincode of Siswatia is 843324.